#include"BinaryTree.h"
bool isSameTree(struct TreeNode* p, struct TreeNode* q) {
    if (q == NULL && p == NULL)
        return true;
    if (q == NULL || p == NULL)
        return false;
    if (p->val != q->val)
        return false;
    return isSameTree(p->left, q->left) && isSameTree(p->right, q->right);
}